Mining-car.



No. 696,070. Patented Mar. 25, |902,

J. rac/MISTER.

mums cAR.

(N0 Model.) l

UNITED STATES PATENT OFFICE.

JOHN MCALISTER, OF BIRWINSDALE, PENNSYLVANIA.

MINING-CAR.

SPECIFICATION forming part of Letters Patent N o. 696,070, dated March 25, 1902. Application led October 17, 1901. Serial No.. '79,021x (No model.)

To all whom t may concern:

Be it known that I, JOHN McALIsTER, a citizen of the United States, residing at Birwinsf dale, in the county of Clearfield andvState ofv Pennsylvania, haveinvented certain new and useful Improvements in Mining-Cars and I do hereby declare the followingto be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

- My invention relates to mining-cars; and it consists of certain novel features of combination and construction of parts, the preferred form whereof will be fully set forth in the following specification. Its object is to provide a reliably eiiicient form of bearing which will be entirely dustproof and self-lubricating.

Other objects and advantages will be made clearly apparent from the followingspeciiication, which shall be considered in connection with the accompanying drawings, of which* Figure 1 is a perspective View of my lnetallic mining-car complete. Fig. 2 is a central section of one of the wheels, showing the form of bearing employed by me. Fig. 3 is a perspective detail view showing the end of the axle, while Fig. LA is a perspective detail view of the cap designedto be received upon the threaded end of said axle, as shown in Fig. 3.

It becomes very desirable and important to provide a car of thischaracter with a dustproof'bearing for thewheels, and I therefore form the hub of the wheel 13 with the integral outwardly-extending flange or sleeveli,y the extreme outer end ofwhich is reduced-in' diameter and threaded, as indicated by the numeral 15 in Fig. 3. It will be understood that the bore of the wheel and of said sleeve will be of sufficient size to receive the journal 16, which latter is of sufficient length to extend slightly beyond the en d of the threaded section 15 and is provided with a suitable aperture to receive the linchpin or split, key 17, by which the wheel is retained upon said j ournal. In order to exclude the dust and to provide an oil-receptacle, I fit the cap 18 so that it will be provided with threads upon its inner end adapted to cooperate with the threads upon the section 15, and thus enable said cap to be turned home against the shoulder 19 and leave the outer surface of the cap iiush with the outer surface of the sleeve 14, as more clearly shown in Fig. 2. The cap 18 is of sufficientlength to extend outward beyond lthe end of the axle and the linchpin, and as of which the cap is turned tightlyhome against the shoulder 19 or against a suitable packing or washer interposed between said parts. The

extension- 20 is provided with a centrally-dis` posed aperture 21, through which oil may be freely introduced from time to time. The space within the cap 18 may thus be filled half full of oil without the liability of the oil escaping or running out of the aperture 21, though, if preferred, a greater quantity of oil may be introduced and retained therein by inserting a suitable plug within the aperture 21, as will be obvious.

The inner end of the cap 18 is provided with a spirally-disposed rib 22,'so formed that the oil will be directed inward by said thread during the rotation or use of the wheel. By the arrangement of the thread or spirally-dis posed rib 22 the oil will thus be 'fed toward the axle and will find its way inward, and thus lubricate the entire extent of the surface of the journal. At a point upon the journal preferably near the middle portion of the wheel I form a circumferential groove 23, adapted to become iilled with grease or oil, and thus prevent the free passage of the oil to the inner end ofthejournal,and thusguarding against vloss thereof.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a cartruck,a wheel having an outwardly- 95 extendingsleeve 5 a journal extendingthrough said wheel and having means to hold the .wheel in place thereon, in combination with a`"cap 18 fitting over the extended end of said sleeve and said journal and provided with a spirally-disposed rib upon its internal surface to direct the oil normally inward, all combined substantially as specified and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN MCALISTER.

Witnesses:

W. T. FITZ GERALD, H. S. REEsIDE. 

